What followed was an array of public mouths and even revenge songs from both sides in the form of Bad Blood and Swish Swish.
The singers decided to lower the tension last year after Katy literally offered the Shake It Off singer an olive branch.
And now mom-to-be Katy has revealed the reason for declaring a truce with Taylor.
Speaking to Howard Stern, the Firework hitmaker said she hoped this would be a good example for young women, adding that the pals now want “the best for each other.”
She explained, “Gossip and lies, they take the elevator. But the truth takes the stairs… time will tell my story. “
She continued, “What I’m so grateful for is that we have been able to reconcile, and we have publicly invented ourselves to be an example of redemption.
“It’s hard for young girls to grow up [with] cliques and high school and pettiness and all that, so now we’re super nice and I’ve always wanted the best for her and we can talk about what we want best for each other. ”
After sending Taylor an olive branch last year, Katy attached a letter of apology, admitting that she had been “deeply sorry” for all the drama between them.
“Hey old friend, I have reflected on past communication issues and hurt feelings between us,” the letter read.
Taylor shared a photo of the letter to her Instagram Story and wrote “Thanks Katy” next to it.
The singers are now at some very exciting stages in their lives, with Katy expecting to welcome her first child – a baby girl – with her fiance Orlando Bloom in a few weeks.
Meanwhile, Taylor has happily dated British actor Joe Alwyn for four years, and their relationship has only grown stronger since.
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